Laserfiche WebLink
S-P TESTING, INC. <br />951 KATYDID LANE <br />ST. MICHAEL, MN 56376 <br />4074M <br />STEVE SHIRMERS <br />November 4, 1987 <br />Dave Woodword <br />888 Dakota Ave. <br />Orono, Henn. Co., MN <br />This sy----em is designed for a Type 1, four bedroom home and in accordance <br />with the Minnesota Pollution Control Agency standards WPC 40 and local <br />ordinances. <br />The soils on this site are typical of -EAB - Erin loam but are SCS soils <br />mapped - HbC - Hayden loam. This site has an existing failing system due <br />to strong clay soils -and a high seasonally high water table located at 18" <br />to 24", (mottling). Space available for installing a new septic system is <br />limited, to design a new system to meet state & city codes is not possible. <br />The soils at a depth of'18" have a percolation rate averaging 46.2 min/inch <br />and are adequate for treating septic effluent. <br />One method to treat septic effluent would be to install holding tanks, (2 - <br />1000 gallon capacity) with a warning device indicating when it is time to <br />pump the tanks. The other method would be to install a shallow bed system <br />18" deep in the higher ground located in the southeast property corner. <br />With the average percolation rate of 46.2 min/inch, recommend to over ex- <br />cavate to a depth of 24" & replace with a clean sand (coarse washed sand) <br />The rock will need a minimum of 6" of cover. A pumping chamber will need <br />to be installed to lift the effluent to the treatment area. Recommend to <br />pressurize this system typical of a mound system using 1-1/2" dia. distri- <br />bution pipe with 1/4" perforation W" apart. Also recommend a holding tank <br />be installed to catch overflow from the system if the system has seepage <br />occuring during the wet seasons,. spring & fall. U<<n- tAfs U se';' 61-it, S tiSrrvu. <br />p5 AAJ ove-e_FLOw ?) <br />Tt.e power supply and switches must be located outside the manhole and <br />pumping chamber in a weather proof enclosure. A warning device must be <br />installed with a light and sound device, this is'in case of a pump failure. <br />(Mercury floats are a good method).. <br />The existing tank may be'used upon approval by the local inspector. <br />All neighboring wells are located more than 75' away from the proposed <br />treatment area and 50' away on this site. <br />Keep all heavy equipment off of the proposed treatment area before and <br />after construction as much as possible. The treatment area Lhould be <br />marked off before construction. <br />With proper installation and maintenance, this system should have no <br />Self and Perrolstbw Testa ( CONT' D ) <br />Septic System Ihmign <br />